From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752394AbcBKEGI (ORCPT ); Wed, 10 Feb 2016 23:06:08 -0500 Received: from mail-pa0-f67.google.com ([209.85.220.67]:33051 "EHLO mail-pa0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751872AbcBKEFY (ORCPT ); Wed, 10 Feb 2016 23:05:24 -0500 From: js1304@gmail.com X-Google-Original-From: iamjoonsoo.kim@lge.com To: Andrew Morton Cc: David Rientjes , Christian Borntraeger , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Benjamin Herrenschmidt , Takashi Iwai , Chris Metcalf , Christoph Lameter , linux-api@vger.kernel.org, Joonsoo Kim Subject: [PATCH v2 3/5] sound: query dynamic DEBUG_PAGEALLOC setting Date: Thu, 11 Feb 2016 13:04:59 +0900 Message-Id: <1455163501-9341-4-git-send-email-iamjoonsoo.kim@lge.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1455163501-9341-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1455163501-9341-1-git-send-email-iamjoonsoo.kim@lge.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joonsoo Kim We can disable debug_pagealloc processing even if the code is compiled with CONFIG_DEBUG_PAGEALLOC. This patch changes the code to query whether it is enabled or not in runtime. v2: export _debug_pagealloc_enabled to modules, per Andrew. Acked-by: David Rientjes Acked-by: Takashi Iwai Signed-off-by: Joonsoo Kim --- mm/page_alloc.c | 1 + sound/drivers/pcsp/pcsp.c | 9 +++++---- 2 files changed, 6 insertions(+), 4 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 87b3e2f..00118fe 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -498,6 +498,7 @@ void prep_compound_page(struct page *page, unsigned int order) unsigned int _debug_guardpage_minorder; bool _debug_pagealloc_enabled __read_mostly = IS_ENABLED(CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT); +EXPORT_SYMBOL(_debug_pagealloc_enabled); bool _debug_guardpage_enabled __read_mostly; static int __init early_debug_pagealloc(char *buf) diff --git a/sound/drivers/pcsp/pcsp.c b/sound/drivers/pcsp/pcsp.c index 27e25bb..72e2d00 100644 --- a/sound/drivers/pcsp/pcsp.c +++ b/sound/drivers/pcsp/pcsp.c @@ -14,6 +14,7 @@ #include #include #include +#include #include "pcsp_input.h" #include "pcsp.h" @@ -148,11 +149,11 @@ static int alsa_card_pcsp_init(struct device *dev) return err; } -#ifdef CONFIG_DEBUG_PAGEALLOC /* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */ - printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, " - "which may make the sound noisy.\n"); -#endif + if (debug_pagealloc_enabled()) { + printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, " + "which may make the sound noisy.\n"); + } return 0; } -- 1.9.1